American Radio Relay League cyberattack takes Logbook of the World offline
The American Radio Relay League (ARRL) warns it suffered a cyberattack, which disrupted its IT systems and online operations, including email and the Logbook of the World. [...]
I must say that the ARRL has been less than forthcoming in their communication with the amateur community.
If you want to track LotW availability: https://status.lotw.arrl.org/